This document discusses weather maps and pressure systems. It defines an isobar as a line on a weather map connecting areas of equal atmospheric pressure, and notes that air moves from areas of high pressure to low pressure. The document contrasts high and low pressure systems and how they affect air movement.

2. Map
 Looks like a contour map
 It is similar
 Instead of elevation
pressure is mapped

3. Isobar
 “iso” means equal to
 “Baro” or “bar” means weight; pressure
 Isobar means equal pressure
 Line on the previous map shows areas of equal
pressure

4. High vs Low Pressure System
High Pressure Low Pressure

5. Air Movement
 Air moves from high to
low pressure.